Collecting snippets that can quickly be copied to assemble a program for different sensors etc. Mostly about ESP8266/32 with Arduino IDE.

Sound Level Meter with Arduino IDE, ESP32 and I2S MEMS microphone

I'm looking for perfect audio DAC for ESP8266/ESP32

Make it act as a USB disk and just copy files on it.

A Working Replica of the classic 555 timer made using discrete components

PCB linear motors offer a different approach to powering tiny scale model trains, cars, boats, etc.

Learn how to build your own brushless motor and control it with a Brushless Biz Card!

Keep track of air quality with pretty graphs

A digital VU meter that looks and moves like an analog needle with mass and spring oscillations

Samples all 6 metrics the EPA uses to calculate Air Quality Index: 2.5 & 10um particulates, O3, CO, NO2, and SO2, and calculates AQI.

An launch pad and gantry for the LEGO Saturn V model. Crane, crew arm, gantry arms, service arms and model itself are animated for liftoff.

Use a USB OTG cable with Android devices for Serial, REPL, and a basic code editor for use withCircuit Python Boards.

Keeping an eye on the seafloor (especially shellfish)